By 2020, the number of cars on the planet will double to two billion. Without big changes to our cars, fuels and personal habits, the carbon footprint from transportation will rise above its current 25 percent of total emissions. Can we break the cycle of “shock and trance?” Join energy expert Sperling as he reveals what is at stake if we refuse to move quickly, and what opportunities exist if we act now.

This program was recorded in front of a live audience at The Commonwealth Club on February 12, 2009